Audio System Symptom Troubleshooting - Audio system information does not display on the audio display(Without Navigation) (2013 2014 2015)
Audio system information does not display on the audio display
NOTE:
- Check the vehicle battery condition first .
- Check the connectors for poor connections or loose terminals.
- Problem verification
-1. Press the engine start/stop button to select the ON mode.
-2. Check if audio information appears on the audio display.
Is there audio information displayed?
YES
Intermittent failure, the system is OK at this time.
NO
The failure is duplicated, go to step 2.
- Open wire check (+B BACK UP line)
-1. Press the engine start/stop button to select the OFF mode.
-2. Measure the voltage between test points 1 and 2.
Test condition OFF mode Test circuit +B BACK UP Test point 1 Audio display unit connector A (32P) No. 16 (WHT) Test point 2 Body ground Is there battery voltage?
YES
The +B BACK UP wire is OK. Go to step 3.
NO
Repair an open in the wire between the No. A29 (10 A) fuse in the under-hood fuse/relay box and the audio display unit.
- Open wire check (GND line)
-1. Press the engine start/stop button to select the ON mode.
-2. Measure the voltage between test points 1 and 2.
Test condition ON mode Test circuit GND Test point 1 Audio display unit connector A (32P) No. 10 (GRY) Test point 2 Body ground Is there less than 0.2 V?
YES
The GND wire is OK. Go to step 4.
NO
Repair an open or high resistance in the wire between the audio display unit and body ground (G502).
- Determine possible failure area (DUET CONT line, others)
-1. Press the engine start/stop button to select the OFF mode.
-2. Disconnect the following connector.
Audio display unit connector A (32P) -3. Press the engine start/stop button to select the ON mode.
-4. Measure the voltage between test points 1 and 2.
Test condition ON mode Audio display unit connector A (32P): disconnected Test circuit DUET CONT Test point 1 Audio display unit connector A (32P) No. 30 (PNK) Test point 2 Body ground Is there battery voltage?
YES
Go to step 7.
NO
Go to step 5.
- Open wire check (DUET CONT line)
-1. Measure the voltage between test points 1 and 2.
Test condition ON mode Audio display unit connector A (32P): disconnected Test circuit DUET CONT Test point 1 Audio unit connector B (20P) No. 14 (PNK) Test point 2 Body ground Is there battery voltage?
YES
Repair an open in the wire between the audio unit and the audio display unit.
NO
The DUET CONT wire is not open. Go to step 6.
- Shorted wire check (DUET CONT line)
-1. Press the engine start/stop button to select the OFF mode.
-2. Disconnect the following connector.
Audio unit connector B (20P) -3. Check for continuity between test points 1 and 2.
Test condition OFF mode Audio display unit connector A (32P): disconnected Audio unit connector B (20P): disconnected Test circuit DUET CONT Test point 1 Audio unit connector B (20P) No. 14 (PNK) Test point 2 Body ground Is there continuity?
YES
Repair a short to body ground in the wire between the audio unit and the audio display unit.
NO
- Shorted wire check (DUET TX line, DUET RX line)
-1. Press the engine start/stop button to select the OFF mode.
-2. Disconnect the following connector.
Audio unit connector B (20P) -3. Check for continuity between test points 1 and 2.
Test condition OFF mode Audio display unit connector A (32P): disconnected Audio unit connector B (20P): disconnected Test circuit DUET TX Test point 1 Audio unit connector B (20P) No. 5 (RED) Test point 2 Body ground Test circuit DUET RX Test point 1 Audio unit connector B (20P) No. 4 (GRN) Test point 2 Body ground Is there continuity?
YES
There is a short to body ground in the wire(s) between the audio unit and the audio display unit. Replace the affected shielded harness.
NO
The DUET TX and the DUET RX wires are not shorted to ground. Go to step 8.
- Shorted wire check (DUET TX line to DUET RX line)
-1. Check for continuity between test points 1 and 2.
Test condition OFF mode Audio display unit connector A (32P): disconnected Audio unit connector B (20P): disconnected Test circuit DUET TX, DUET RX Test point 1 Audio unit connector B (20P) No. 5 (RED) Test point 2 Audio unit connector B (20P) No. 4 (GRN) Is there continuity?
YES
There is a short in the wires between the audio unit and the audio display unit. Replace the affected shielded harness.
NO
The DUET TX and the DUET RX wires are not shorted. Go to step 9.
- Shorted wire check (SH DUET line to another lines)
-1. Check for continuity between test points 1 and 2.
Test condition OFF mode Audio display unit connector A (32P): disconnected Audio unit connector B (20P): disconnected Test circuit SH DUET, DUET TX Test point 1 Audio unit connector B (20P) No. 15 (GRY) Test point 2 Audio unit connector B (20P) No. 5 (RED) Test circuit SH DUET, DUET RX Test point 1 Audio unit connector B (20P) No. 15 (GRY) Test point 2 Audio unit connector B (20P) No. 4 (GRN) Is there continuity?
YES
There is a short in the wires between the audio unit and the audio display unit. Replace the affected shielded harness.
NO
The SH DUET wire is OK. Go to step 10.
- Open wire check (DUET TX line, DUET RX line)
-1. Check for continuity between test points 1 and 2.
Test condition OFF mode Audio display unit connector A (32P): disconnected Audio unit connector B (20P): disconnected Test circuit DUET TX Test point 1 Audio unit connector B (20P) No. 5 (RED) Test point 2 Audio display unit connector A (32P) No. 29 (RED) Test circuit DUET RX Test point 1 Audio unit connector B (20P) No. 4 (GRN) Test point 2 Audio display unit connector A (32P) No. 13 (GRN) Is there continuity?
YES
The DUET TX and the DUET RX wires are OK. Go to step 11.
NO
There is an open in the wire(s) between the audio unit and the audio display unit. Replace affected shielded harness.
- Audio unit check
-1. Substitute a known-good audio display unit .
-2. Reconnect all the connectors, and recheck.
Does the symptom go away?
YES
Replace the original audio display unit.
NO